diff --git a/service-mesh/istio/sample/istio-plural-course/02/demos/src/details-api/BookInfo.Details.csproj b/service-mesh/istio/sample/istio-plural-course/02/demos/src/details-api/BookInfo.Details.csproj
index c0cd0cd..2dc51a2 100644
--- a/service-mesh/istio/sample/istio-plural-course/02/demos/src/details-api/BookInfo.Details.csproj
+++ b/service-mesh/istio/sample/istio-plural-course/02/demos/src/details-api/BookInfo.Details.csproj
@@ -8,7 +8,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="3.0.1" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.0.1" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.1" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
 </Project>
\ No newline at end of file